This is the first of two volumes on belief and counterfactuals. It provides an introduction to ranking theory, which is a powerful formal theory with a broad range of applications in different areas of analytic philosophy. Drawing on formal logic, ranking theory can account for degrees of belief, which can change with the introduction of new information. In this volume, Franz Huber applies ranking theory and belief revision to metaphysics and epistemology. Though
based on his technical writings, the book is intended to be as accessible as possible, in order to fully present the utility of ranking theory to a wide range of philosophical issues.